props/Props/server/Controllers/PublicApiSettingsController.cs

using System.Collections.Generic;
using System.IO;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Props.Options;

namespace Props.Server.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class PublicApiSettingsController : ControllerBase
    {
        private IConfiguration configuration;
        public PublicApiSettingsController(IConfiguration configuration)
        {
            this.configuration = configuration;
        }

        [HttpGet]
        public IActionResult Get() {
            return Ok(BuildPublicApiSettings());
        }

        private IReadOnlyDictionary<string, string> BuildPublicApiSettings() {
            IdentificationOptions identificationOptions = configuration.GetSection(IdentificationOptions.Identification).Get<IdentificationOptions>();
            return new Dictionary<string,string>() {
                // Build dictionary containing options client should be aware of.
                {"RegistrationEnabled", identificationOptions.RegistrationEnabled.ToString()}
            };
        }
    }
}